Logic gates are elementary building blocks of digital circuits that have inputs and outputs representing binary digits 0 and 1. There are several basic types of logic gates including AND, OR, NOT, XOR, NAND, NOR, and XNOR gates. Each gate functions according to specific rules - for example, an AND gate only outputs 1 if all its inputs are 1, while a NAND gate produces the opposite output of an AND gate. Logic gates are used in various electronic devices and circuits.

1. Logic Gates

2. BY: Adeel Rasheed

3. A logic gate is an elementary building
block of a Digital Circuit.
 Most logic gates have two inputs and one output
 Every terminal is in one of the two Binary Digits
(0) or (1)
 Low state approximately zero volts (0 volts)
 High state approximately five volts (+5 volts)

4. Possibilities of (0) or (1)
1 0
On Off
High Low
Open Close
Right Wrong
Yes No
True false

5. Basic types of logic gates.
 AND Gate
 OR Gate (or inverter)
 NOT Gate
 XOR Gate (Exclusive-OR Gate)
 NAND Gate
 NOR Gate
 XNOR Gate (Exclusive-NOR Gate)

6. AND Gate
 An AND gate accepts two input signals
 If the two input values for an AND gate are both 1, the
output is 1; otherwise, the output is 0

7. AND Gate
 A binary arrangement with two switches in series

8. OR Gate
 If the two input values are both 0, the output value is
0, otherwise, the output is 1

9. OR Gate
 A binary arrangement with two switches in parallel

10. Not Gate
 A logical inverter , sometimes called a NOT gate to
differentiate it from other types of electronic inverter
devices, has only one input. It reverses the logic state.

11. XOR Gate
 XOR, or exclusive OR, gate
 An XOR gate produces 0 if its two inputs are the same,
and a 1 otherwise
 Note the difference between the XOR gate
and the OR gate; they differ only in one
input situation
 When both input signals are 1, the OR gate produces a 1
and the XOR produces a 0

12. XOR Gate

13. XOR Gate
(A*B) (A*B) A B
  
XOR Gate having two AND, one OR and two
NOT Gates

14. NAND Gate
 A NAND gate produces the opposite results of an AND
gate

15. NAND Gate
NAND Gate is combination of AND
and NOT Gate

16. NOR Gate
 A NOR gate produces the opposite results of an OR
gate

17. NOR Gate
NOR Gate is combination of OR and
NOT Gate

18. XNOR Gate
 A NOR gate produces the opposite results of an XOR
gate

19. XNOR Gate
XNOR Gate is combination of XOR
and NOT Gate

20. Uses of Gates
 Use for doorbell
 Use in smoke sensors
 Use in traffic lights
 Use in mobile or calculators
 Use in UPS chips